User guide

28 DC 900-1303C
Freeway Client-Server Interface Control Document
Get Time
Not implemented at this time.
Get Version
This packet requests the Freeway software version string from the server.
Get Version Response
This packet reports the Freeway software version string in the data area. A typical string
returned is
Freeway Release 2.1.
2.1.2.2 Freeway Data Packets
Either the client or server can issue Freeway data packets. These packets contain ICP
data, that is, data buffers transferred between the ICP and the Freeway server MsgMux
task. These packets may or may not contain data transferred over the WAN link. At
minimum, a data packet consists of a TSI header, Freeway header, ICP header, and Pro-
tocol header; ICP data, if any, immediately follows the Protocol header. The following
sections describe each Freeway data packet. Figure 2–3 shows an example of packet data
flow.
Data Packet to ICP
After the client has opened a session (using the Open Session Request), this packet may
be sent to the server; it must contain the Freeway session ID in the Freeway header. If
this packet is invalid, the server will send it back to the client; the status field will indi-
cate the reason for rejection. If this packet passes validation, it is forwarded to the ICP;
no response is sent to the client.